Fine-scale variation in topography and seasonality determine radial growth of an endangered tree in Brazilian Atlantic forest

Vanessa Pontara*, Marcelo L. Bueno, Leticia E. Garcia, Ary T. Oliveira-Filho, Toby R. Pennington, David F R P Burslem, José P. Lemos-Filho

*Corresponding author for this work

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Aims: We use dendroecological methods to test the hypothesis that variation in topographic position is related to radial growth and phenology for individuals of the endangered tropical tree Dalbergia nigra under uniform conditions of climate and irradiance, and to examine effects of seasonality on plant phenology and growth periodicity. Methods: Dendrometer-based measurements of stem diameter change over 26 months and local measurements of soil nutrient and water availability were compared for 24 individuals of D. nigra distributed equally between summit and valley positions within a topographically heterogeneous fragment of Atlantic Forest in southeastern Brazil. Results: Soil water and nutrient availability, and cumulative radial growth, were greater for trees in valley than summit positions. Monthly diameter increment was seasonal and positively related to monthly rainfall. D. nigra was seasonal in all phenophases, regardless of topographic position, and there were no differences in the frequency, timing or intensity of phenophases among topographic positions. Conclusions: We conclude that low soil nutrient and/or moisture availability reduce radial growth of D. nigra individuals growing in summit positions, while trees growing in valleys exhibit faster annual growth. Vegetative phenology is unaffected by fine-scale variation in topography.

Original languageEnglish
Pages (from-to)115-128
Number of pages14
JournalPlant and Soil
Volume403
Issue number1-2
Early online date15 Jan 2016
DOIs
Publication statusPublished - 1 Jun 2016

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Keywords

  • Dalbergia nigra
  • Dendroecology
  • Phenology
  • Seasonal drought
  • Soil fertility
  • Soil water

ASJC Scopus subject areas

  • Soil Science
  • Plant Science

Cite this

Pontara, V., Bueno, M. L., Garcia, L. E., Oliveira-Filho, A. T., Pennington, T. R., Burslem, D. F. R. P., & Lemos-Filho, J. P. (2016). Fine-scale variation in topography and seasonality determine radial growth of an endangered tree in Brazilian Atlantic forest. Plant and Soil, 403(1-2), 115-128. https://doi.org/10.1007/s11104-016-2795-3